PACWOMAN Sintesi della relazione

Design and implementation of a flexible OFDM transmitter

During the PACWOMAN project, Lund University has designed and implemented a flexible OFDM transmitter. The FFT processor is a central part of an OFDM transceiver, and has been fabricated both as a stand alone chip and as part of an OFDM transmitter chip. The transmitter chip includes in addition to the FFT, a signal mapper and a cyclic prefix inserter. It is shown that high flexibility is obtained in the transmitter with a reasonable amount of extra hardware.

Comprehensive measurements on power consumption are presented for both chips. A scheme to reduce hardware and delay in an OFDM transceiver is found. The scheme shows that the data buffers in an OFDM transceiver, due to a cyclic prefix and a bit reversing pipelined FFT processor, can be significantly reduced with a cyclic suffix and a bidirectional FFT processor.